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In this lesson, we will learn how to decide if a number up to 20 is odd or even by seeing if we can make two equal groups without one left over.

Q1:

There are the same number of squares in each of these two circles.

Is the total number of squares even or odd?

Q2:

Is 8 even or odd?

Q3:

Is 9 even or odd?

Q4:

There are the same number of squares in each of these two circles, and one more square is outside the circles.

Q5:

Sherif bought a pack of 15 stickers. He already had 3 of them, so he gave them to his friend. Does he have an odd or even number of stickers left?

Q6:

A number is even if it can be split into two groups of equal size.

These 6 squares can be split into two groups of 3 squares. So, 6 is even.

Which of the following numbers is even?

Q7:

A number is even if we can split it into groups of two with nothing left over.

These 8 squares can be split into 4 groups of 2 squares. So, 8 is even.

Q8:

A number is odd if it cannot be split into two groups of equal size.

These 7 squares can be split into two groups of 3 with 1 left over. So, 7 is odd.

Which of the following numbers is odd?

Q9:

Here is a group of 6 people.

Can we split them into two groups with the same number of people in each group?

Q10:

Here is a group of 7 people.

Q11:

Is 13 even or odd?

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